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diff --git a/src/mame/drivers/mits680b.cpp b/src/mame/drivers/mits680b.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Miodrag Milanovic, Robbbert
+/***************************************************************************
+
+ MITS Altair 680b
+
+ 03/12/2009 Skeleton driver.
+
+ 08/June/2011 connected to a terminal
+
+Monitor Commands:
+J
+L switch to terminal mode
+M
+N modify memory in a limited way
+P this does a rti and causes a momentary crash. Weird.
+
+
+ToDo:
+- Hook ACIA back up, when there is some way to use it.
+
+
+****************************************************************************/
+
+#include "emu.h"
+#include "cpu/m6800/m6800.h"
+#include "machine/mos6551.h"
+#include "machine/terminal.h"
+
+#define TERMINAL_TAG "terminal"
+
+class mits680b_state : public driver_device
+{
+public:
+ mits680b_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag),
+ m_maincpu(*this, "maincpu"),
+ m_terminal(*this, TERMINAL_TAG)
+ {
+ }
+
+ required_device<cpu_device> m_maincpu;
+ required_device<generic_terminal_device> m_terminal;
+ DECLARE_READ8_MEMBER(terminal_status_r);
+ DECLARE_READ8_MEMBER(terminal_r);
+ DECLARE_READ8_MEMBER(status_check_r);
+ DECLARE_WRITE8_MEMBER(kbd_put);
+ UINT8 m_term_data;
+ virtual void machine_reset();
+};
+
+READ8_MEMBER( mits680b_state::status_check_r )
+{
+ return 0; // crashes at start if bit 7 high
+}
+
+READ8_MEMBER( mits680b_state::terminal_status_r )
+{
+ return (m_term_data) ? 3 : 2;
+}
+
+READ8_MEMBER( mits680b_state::terminal_r )
+{
+ UINT8 ret = m_term_data;
+ m_term_data = 0;
+ return ret;
+}
+
+
+static ADDRESS_MAP_START(mits680b_mem, AS_PROGRAM, 8, mits680b_state)
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE( 0x0000, 0x03ff ) AM_RAM // 1024 bytes RAM
+ //AM_RANGE( 0xf000, 0xf003 ) AM_DEVREADWRITE("acia", mos6551_device, read, write )
+ AM_RANGE( 0xf000, 0xf000 ) AM_READ(terminal_status_r)
+ AM_RANGE( 0xf001, 0xf001 ) AM_READ(terminal_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write)
+ AM_RANGE( 0xf002, 0xf002 ) AM_READ(status_check_r)
+ AM_RANGE( 0xff00, 0xffff ) AM_ROM
+ADDRESS_MAP_END
+
+/* Input ports */
+static INPUT_PORTS_START( mits680b )
+INPUT_PORTS_END
+
+
+void mits680b_state::machine_reset()
+{
+ m_term_data = 0;
+}
+
+WRITE8_MEMBER( mits680b_state::kbd_put )
+{
+ m_term_data = data;
+}
+
+static MACHINE_CONFIG_START( mits680b, mits680b_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu",M6800, XTAL_1MHz / 2)
+ MCFG_CPU_PROGRAM_MAP(mits680b_mem)
+
+ /* video hardware */
+ MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0)
+ MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(mits680b_state, kbd_put))
+
+ /* acia */
+ //MCFG_ACIA6551_ADD("acia")
+MACHINE_CONFIG_END
+
+/* ROM definition */
+ROM_START( mits680b )
+ ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+ ROM_LOAD( "mits680b.bin", 0xff00, 0x0100, CRC(397e717f) SHA1(257d3eb1343b8611dc05455aeed33615d581f29c))
+ROM_END
+
+/* Driver */
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
+COMP( 1976, mits680b, 0, 0, mits680b, mits680b, driver_device, 0, "MITS", "Altair 680b", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)